April 12 was already a huge day in space history twenty years before the launch of the first shuttle mission. On that day in 1961, Russian cosmonaut Yuri Gagarin<span> became the first human in space, making a 108-minute orbital flight in his Vostok 1 spacecraft.</span>
"The Fog Horn," the narrator and a man named McDunn work in a stone tower, far out from land, to alert ships passing through the fog of their proximity to land. The tower emitted red and white lights, as well as a "Voice," the deep cry that the Fog Horn sent out into the world. It was lonely work. On the night before it was the narrator's turn to return to land, McDunn tells him that he has something special to tell him about.
Explanation:
In a fully developed use case description the postcondition data describes the existence of domain model objects.
A postcondition in computer programming is a condition or predicate that, immediately following the execution of a certain line of code or an action in a formal specification, must always be true. In some cases, code-based assertions are used to test postconditions. Postconditions are frequently just listed in the affected code section's documentation.
Postconditions, together with preconditions and class invariants, are elements of the programme construction process design by contract in several software design methodologies.
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